I'm currently in the process of switching networks, leaving TGN because of pretty robotic/lackluster support and I've succumbed to the lack of an earnings dashboard, haha. Plus general horror stories of people not getting payments and whatnot are a bit offputting. I can't speak at all to the payments yet because it'll be a few more weeks before I get mine.
Right now I've got my eye very fixed on Vultra myself. I applied for them, TGS, and Fullscreen. Haven't heard from Fullscreen or TGS, but Vultra got back to me within 24 hours on a weekend saying they'd be more than thrilled to have me (Made me blush a little, haha), which I'm amazed at how fast they got back to me. Plus with the reception I've heard of them, and with the way Shane's talked about their CPMs and all, they're looking super good.
They actually got in touch with me about a year ago asking me to join, but I didn't really think much of it, since they were very new at the time and so I just sorta brushed them off, but looking at them now I can definitely say they've come very far. Plus for me, because they are relatively small, I believe with my views I'd actually stick out a good deal on the BentPixels socialblade page, which could possibly get me a bit of publicity if people ever check them out, but that's besides the point.
All in all I'd recommend applying for all of the one's you named, plus the ones people have suggested, and just comparing their deals and contracts to see which one is best for you.